Saw set



April 28, 1925 E. v. suMMRELl.

SAW SET Filed May 24, 1924 v5 Sheets-Sheet l gwuentoz April 28, 1925- E. v. sUMMERl-:LL

SAW SET Filed May 24, 1924 3 Sheets-Sheet 2 April 28, 1925- E. v".` SUMMERELL Filed May 24, 1924' 3 Sheets-Sheet 5 Patented Apr. 28, 1925.

UNITED STATES PATENT OFFICE.'

EDWARD VERNON SUMMERELL, OF NDR-FOLK, VIRGINIA.

SAW SET.

Application filed May 24, 1924. Serial No. 715,633.

To all whom t may concern:

` Be it known that I, EDWARD VERNON SUM- MERELL, a citizen of the United States, residing at Norfolk, in the county of Norfolk and State of Virginia, have `invented certain new and useful Improvements in a vSaw Set, of which t-hefollowing is a specifibe readily adjusted to accommodate saws of different sizes.

ln the accompanying drawings:

Fig. 1 is a side edge elevation of the saw-` set showing the same applied to a circular saw; n K

Fig. 2 is a top plain view of the saw-set;

VFig. 3 isa transverse sectional view of the saw-set cut on the line 3 3 of Fig. 2;

Fig. 4 is aside elevation of a disk wheel. used upon the saw-set;

Fig. 5 isa sectional view of a saw supporting shaft structure used upon t-he sawset; j l

Fig. G is a. fragmentary' side elevation of a feeding mechanism usedupon the sawset;

Fig. 7 is a perspective view of a guide used upon the saw-set;

Fig. 8 is a perspective view of a pawl mechanism used upon the saw-set;

Fig. 9 is a perspectiveview of a pawl `used upon the saw-set;

p Fig. 1() is a perspective view of the part used in the saw-set; and Y Fig. 11 is a perspective view of spring means used upon thesaw-set and adapted to engage theteeth of the saw and adapted to hold the saw against retrograde movement when the saw is about to be moved to present Vthe unset teeth to the active elements of the saw-set.

As illustrated in the accompanying drawings, the saw-set comprises a base 1 having` a knee 2 fixed thereon and a knee 3 adjustably mounted thereon and adapted to be secured at an adjusted position by means of a bolt 1. A set-screw 5 is threaded through a lug provided upon the base and engages the end of the `knee 3 and may be used for shifting the knee upon the base.

A shaft 6 is journaled for rotation upon the base 1 and is provided at one end with a wheel 7 having a handle 8 eccentrically positioned thereon. rlfhe wheel 7 is provided at the inner side of its hub with cam faces 9. An ova-te cam 10 is mounted upon the intermediate portion of the shaft 6. Levers l1 are pivotaliy mounted one upon the knee 2 and the other upon the knee 3. Saw-teeth swag-ing dogs 12 and 13 are pivotally mounted upon the upper end of the levers 11. The dogs 13 and 12 are of the same design and configuration and a description of one will answer for both. The dog is best shown in perspective in Fig. 10 of the drawings, and each dog is provided with a depending flange 111 adapted to operate or-move in a transversely disposed groove `provided at the upper end of the knee 2 or Each dog's provided at its upper edge with a notch 15.l Catch members 16 are located between the dogs 12 and 13 and 'are provided at points between their ends with shoulders 17 adapted toengage in the 'i notches 15 ofthe dogs 12 or 13. Coiled springs 18 are connected with the lower ends of the catches 16 and connectedwith thepintermediate portion of the lever 11 and serve to hold lthe shoulders 17 of the catches down in the notches 15 of the dogs. Y Coiled springs 19 are connected at their outer ends with the intermediate portions of the levers 11and at their inner ends with the knees and serve to hold the lower ends of the levers 11 toward the cam 10 upon the shaft (i. Set-screws 20 are threaded transversely through the levers 11. and bear at their immer ends against the outer side of the knees and serve as means for limiting the inward swinging movement of the lower ends of the levers `11. vLugs 21 are pivoted at the lower inner portions of the levers 11 and are provided `at their inner sides with journaled rollers 22 which bear upon the periphery of the cam 10'. Setscrews 23 are threaded through the lower portions of the levers 11 and bear against the lower end portions ofthe lugs 21 and serve as means for adjustably fixing the rollers 22 with relation to the lower ends of the levers 11. The knees 2 and 3 are provided at their upper ends with arms 2-1- through which a bolt 25 passes and the said `bolt bridges the space between the innerV surfaces of the knees 2 and 3. A stud 26 is mounted upon the base 1 and a collar 27 is adjustably secured by means of a setscrew upon the said stud. An arm 29 is pivotally mounted upon the collar 27 and a spring 30 is fixed to the collar and bears against the upper edge of the arm 29 and serves to normally hold the said arm in a lowered position. A claw 31 is pivoted at the outer end of the arm 29, and a spring 32 is attached at one end to the arm and bears at its other end against the upper edge of the claw and serves to hold the free end of the claw toward the teeth of the saw which is positioned between the knees, as will be hereinafter explained.

A lug 34 is pivotally mounted at the under side of the arm 29 and a set-screw 35 passes transversely through the arm and bears against the upper edge of the lug 34 and serves to hold the free end of the said lug.

A shaft 36 is pivoted for rocking movement upon the` base 1 and carries an arm 37 which is provided at its end with a journaled roller 38 adapted to be operated upon by the surfaces of the cam 9 when the wheel 7 is rotated whereby the arm 37 is swung, the shaft 36 is rocked, and the arm 29 is rocked by an arm 39 mounted upon the shaft 36. A roller 40 is ournaled at the end of the arm 39 and bears against the under surface of the lug 34. Therefore as the arm 29 is rocked, the claw member 31 engages one tooth of the saw 33 and the said saw is partially rotated, as will be hereinafter explained, whereby a tooth is brought between the inner end of the dogs 12 and the said tooth is swaged to one side and out of the plane of the body of the saw.

At the time that the shaft 6 is rotated, as hereinbefore stated, the cam 10 turns about the axis of the shaft. 6 and the lower ends of the levers 11 are spread with relation to each other, and the upper end of the lever 11`which is actuated by the keeper portion of the cam 10 is moved inwardly toward the saw and the dog 12 carried at the upper end of the said lever engages the tooth of the saw and swages the said tooth.

A bracket 41 is secured upon the fixed knee 2 and a post 42' is adjustably secured upon the bracket 41. A frame 43 is adjustably secured to the post 42 and a block 44 is mounted for movement longitudinally of the frame 43. A screw 45 is journaled in the frame 43 and threaded through the block 44, and by turning the said screw, the block 44 may be shifted along the frame 43. A spindle 46 is carried by the block 44 and disks 47 are mounted upon the spindle 46 and the saw 33 is held upon the `spindle between the disk 47 as best shown in Fig. 5 of the drawing. rherefore. it will be seen that means are provided for holding a circular saw in position between the knees in order that the teeth of the saw may be properly and accurately swaged.

`When the device is used for setting the teeth of a circular saw, the dogs 12 only are used, and the dogs 13 are turned back to the positions shown in full lines in Fig. 3 of the drawings.

When the device is used for setting the teeth of a band saw, as shown at 33 in Fig. 6, the dogs 12 are swung back and the dogs 13 are swung over the upper end of the knees 2 and 3 and assume the positions as shown in dotted lines in Fig. 3. The dogs 13 are held by the catch members 16 which are lifted and turned so that their shoulder 17 may engage in the notches in the upper edges of the dogs 13. An arm 50 is pivoted at the side of the knee 2 and a set-screw 51 is threaded through the said arm and bears against the side of the knee and serves to limit the swinging movement of the arm. A rod 52 connects the lower end of the arm 50 with the lower portion of the arm 37 mounted upon the shaft 36. A head 53 is carried at the upper end of the arm 50 and a pawl 54 is pivoted upon the head. A spring 55 is secured at one end to the head 53 and bears at its other end against the upper edge of the pawl 54 and serves to hold the free end of the pawl down between the teeth of the saw 33. rlhus as the shaft 36 is rocked, the rod 52 is moved longitudinally whereby the arm 50 is rocked and the pawl 54 engages the edge of one of the teeth of the saw and moves the saw longitudinally between the dogs 13. As the shait 6 continues to rotate, the levers 11 are swung with rela- 'tion to each other, as hereinbefore described, and the ends of the dogs 13 encounter the sides of the tooth which is between the said dogs and the said tooth is swaged out of the plane of the body of the saw.

Having described the invention, what is claimed is:

1. A saw-set comprising a base having a knee xed thereon, a knee adjustably mounted upon the base, levers pivoted upon the knees, dogs pivoted upon the levers and guided along the upper portions of the knees, said dogs provided on their upper edges with notches, catch members provided with shoulders engageable with `the notches of the dogs, springs attached to the ends of the catch members and to the levers, a shaft journaled upon the base between the levers, and a cam mounted upon the shaft and adapted to swing the levers as the shaft is turned.

2. A saw-set comprising a base having a knee fixed thereon, a knee adjustably mounted upon the base, levers pivoted upon the knees, dogs pivoted upon the levers and guided along the upper portions of the knees, said dogs provided on their upper edges with notches, catch members provided with shoulders engageable with the notches of the dogs,

springs attached to the ends of the catch members and to the'levers, and means for' rocking the levers. In combination, a4 base, neled on the. base, saW-settingmeans operable by the shaft, e cam on seid shaft, e 1ocllever aetuatable by saideam, a pivoted arm, a lug pivoted to an intermediate portion of the arm and engageable by the free `l0 end of the level1 for rocking the arm, a set! Screw threaded through the arm and engageable with the lug for adjusting the same in relation to the arm and the free end of the lever, ayclaw pivoted on the free `end of the ziim for engaging the teeth of the sew, and a spring disposed between the arm and the Claw to hold the seid claw in resilient engagement With the teeth of th'e saw.

In testimony whereof I alii); my signature.

EITWAI-D VERNON SUMMERELL, 

